The Breites Wasser is a lake in the borough of Osterholz-Scharmbeck in the German state of Lower Saxony on the terrain of the Teufelsmoor.

A nature reserve of the same name lies around the lake between Worpswede and the village of Teufelsmoor.

The many ox-bows of the streams and small irregular ponds with boggy shores, the so-called Blänken form a wetland triangle (feuchtes Dreieck), which constantly changes its appearance due to the variations in water levels.

In autumn and spring quite a few migratory birds rest here en route to their destinations.

Several years ago a large number of paths were laid out for walkers.